11120012121221 has 4 divisors (see below), whose sum is σ = 11329823670732. Its totient is φ = 10910200571712.

The previous prime is 11120012121203. The next prime is 11120012121259. The reversal of 11120012121221 is 12212121002111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3437353080100 + 7682659041121 = 1854010^2 + 2771761^2 .

It is a cyclic number.

It is not a de Polignac number, because 11120012121221 - 2¹⁴ = 11120012104837 is a prime.

It is a super-2 number, since 2×11120012121221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11120012121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120012121121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104905774676 + ... + 104905774781.

It is an arithmetic number, because the mean of its divisors is an integer number (2832455917683).

Almost surely, 2^{11120012121221} is an apocalyptic number.

It is an amenable number.

11120012121221 is a deficient number, since it is larger than the sum of its proper divisors (209811549511).

11120012121221 is an equidigital number, since it uses as much as digits as its factorization.

11120012121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209811549510.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11120012121221 its reverse (12212121002111), we get a palindrome (23332133123332).

The spelling of 11120012121221 in words is "eleven trillion, one hundred twenty billion, twelve million, one hundred twenty-one thousand, two hundred twenty-one".